[Rd] cummax / cummin for complex numbers
Duncan Temple Lang
dtemplelang at ucdavis.edu
Mon Jul 14 17:18:12 CEST 2014
I believe Michael's point is that the error messages
are incorrect - referring to cunmax when cunmin was called
and vice verse.
On 7/14/14, 8:14 AM, Ben Bolker wrote:
> Michael Haupt <michael.haupt <at> oracle.com> writes:
>> Dear all,
>> in R 3.1.0, this is happening:
>> Error in cummin(c(1 + (0+1i), 2 - (0+3i), 4 + (0+5i))) :
>> 'cummax' not defined for complex numbers
>> Error in cummax(c(1 + (0+1i), 2 - (0+3i), 4 + (0+5i))) :
>> 'cummin' not defined for complex numbers
>> It may be fixed in R-devel, but I thought I'd mention it to make sure ...
> Well, it is documented in the development version:
> x: a numeric or complex (not ‘cummin’ or ‘cummax’) object, or an
> object that can be coerced to one of these.
> I imagine the problem is in coming up with a good, consistent definition
> of the min/max for complex numbers: would you prefer min/max modulus,
> phase, real part, imaginary part ... ? max()/min() aren't even defined
> for complex numbers in R ...
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